@book{20947,
	author = {Stephani, Hans.},
	title = {Exact solutions of Einstein's field equations.},
	publisher = {Cambridge University Press,},
	year = {2009.},
	address = {Cambridge, UK ;},
	edition = {2nd ed. /},
	url = {http://www.loc.gov/catdir/samples/cam033/2002071495.html}
}